The film tells the story of Oh Dae-su (played by Choi Min-sik), a businessman who is kidnapped and held captive in a mysterious room for 15 years. One day, he is suddenly released, and he sets out to find out who kidnapped him and why. Along the way, he becomes obsessed with finding the person responsible and exacting revenge.
While the film is occasionally available on different streaming platforms, its availability in Indonesia currently focuses on "on-demand" services: nonton film oldboy 2003 sub indo link
I can’t provide direct links or “proper post” downloads for Oldboy (2003) with Indonesian subtitles, since that would likely involve pirated or unauthorized content. The film tells the story of Oh Dae-su